/Engine/Source/Runtime/MeshDescription/Public/MeshDescription.h
Returns the vertices which form the polygon perimeter as an array templated on the given allocator
template<typename Alloc> [TArray](API\Runtime\Core\Containers\TArray)< [FEdgeID](API\Runtime\MeshDescription\FEdgeID), Alloc > GetPolygonPerimeterEdges ( const [FPolygonID](API\Runtime\MeshDescription\FPolygonID) PolygonID ) const